Selling property in Thalwil: prices, tax and the new zoning rules

Thalwil now has a broad house market. In 2025, 25 houses were sold on the open market; in 2015 there were only 7.² Back then that was not enough for an official median; the canton requires at least 15 sales. Today it stands at CHF 2,480,000, 56 per cent above the cantonal figure.

For flats the market is broader still. 69 condominiums changed hands in 2025, at a median of CHF 1,985,000. That is 45 per cent more than in 2015, when there were 51 sales. A house here fetches about 1.25 times the price of a flat; the medians are CHF 495,000 apart.

What this means for you: with so many sales, Thalwil offers good comparables for your house. But buyers also have a choice. A price that fits the comparables, and complete documents, are decisive here.

Voters approved the full revision on 14 June 2026. It is not yet in force.⁶ The new regulations keep the value capture levy unchanged. Since February 2023, Thalwil has charged 40 per cent of the gain in value minus CHF 100,000.⁶ That is the legal maximum.⁸ Plots under 1,200 square metres are generally exempt.

The levy only concerns the rise in value from upzoning or rezoning, when more may be built. It falls due on development, not on sale.⁹ If you sell beforehand, the obligation passes to the buyer.⁸ Such an obligation usually lowers what a buyer is willing to pay. A lot is at stake. The canton’s model puts residential building land in Thalwil at CHF 3,259 per square metre in 2025, 90 per cent more than in 2015.¹¹

What this means for you: check the zoning plan to see whether your plot is affected. And have any possible levy included in the valuation. More in the guide to the value capture levy.

In the example, property gains tax takes CHF 321,104, or 12.9 per cent of the sale price. The tariff is the same throughout the canton; the municipality only levies the tax.¹ After 20 full years of ownership it is halved. For the same gain it would then be CHF 286,700.

If you move away, the tax rate at your new home counts, for income and wealth.³ Thalwil is at 78 per cent, 173 per cent including the canton. On the same income, Kilchberg means about 3 per cent less cantonal and municipal tax, Horgen about 7 per cent more. In Thalwil, 19.3 per cent of the population are 65 or older, 3,631 people.⁴

For buyers who commute into the city, the train matters. From Thalwil the journey to Zürich HB takes from 9 minutes, on the fastest train of the hour.⁵ Other connections take longer. What this means for you: state the connection honestly in the listing, with the walk to the station.